Santiago Sierra ( 1966 - ) is a painter. Santiago Sierra s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 391.94 USD for La Visita (Der Besuch) in 2008 to 9476.28 USD for Wall enclosing a space (Spanish pavilion, Venice Biennial, Venice, Italy) in 2012 , based on the size and medium of the artwork.